<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <link rel="stylesheet" href="../libs/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="../libs/jquery/2.1.1/jquery.min.js"></script>
  <script src="../libs/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<nav class="navbar navbar-default" role="navigation">
  <div class="container-fluid container">
    <div class="row">

      <div class="col-sm-12">
        <ul class="nav navbar-nav">
          <li class="active col-sm-3"><a href="#">一</a></li>
          <li class="col-sm-3"><a href="#">二</a></li>
          <li class="dropdown col-sm-3">
            <a href="#" class="dropdown-toggle " data-toggle="dropdown">
              三
              <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
              <li class="divider"></li>
              <li><a href="#">选择1</a></li>
              <li class="divider"></li>
              <li><a href="#">选择2</a></li>
            </ul>
          </li>
          <li class="dropdown col-sm-3">
            <a href="#" class="dropdown-toggle col-sm-2" data-toggle="dropdown">
              四
              <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
              <li class="divider"></li>
              <li><a href="#">选择1</a></li>
              <li class="divider"></li>
              <li><a href="#">选择2</a></li>
            </ul>
          </li>

        </ul>
      </div>
    </div>
  </div>
</nav>
<div class="container">
  <div class="row">
    <div class="panel panel-default col-sm-3" id="accordion">
      <div class="panel panel-default">

        <div class="panel-heading">
          <div class="panel-title">
            <a data-toggle="collapse" data-parent="#accordion" href="#css1"
               >
              <div class="panel-title">CSS</div>
               </a>
          </div>
        </div>

        <div id="css1" class="panel-collapse collapse in">
          <div class="panel-body">css教程</div>
          <div class="panel-body">css语法</div>
          <div class="panel-body">cssID</div>
        </div>

      </div>
      <div class="panel panel-default">
        <div class="panel-heading">
          <div class="panel-title">
            <a data-toggle="collapse" data-parent="#accordion" href="#collapseTwo"
               ><div class="panel-title">HTML</div>´
               </a>
          </div>
        </div>
        <div id="collapseTwo" class="panel-collapse collapse">
          <div class="panel-body">HTML标记1</div>
          <div class="panel-body">HTML标记2</div>
          <div class="panel-body">HTML标记3</div>
        </div>

      </div>
      <div class="panel panel-default">
        <div class="panel-heading">
          <a data-toggle="collapse" data-parent="#accordion" href="#collapseThree">
            <div class="panel-title">一二三</div>
          </a>
        </div>
        <div id="collapseThree" class="panel-collapse collapse">
          <div class="panel-body">一</div>
          <div class="panel-body">二</div>
          <div class="panel-body">三</div>
        </div>
      </div>
    </div>
    <div class="container" style="background-color: #2ac4f8">
      <div class="row">
        <p class="col-sm-9">2</p>
      </div>
    </div>
  </div>
  <div style="padding: 100px 100px 10px;">
    <form class="bs-example bs-example-form" role="form">
      <div class="input-group">
        <span class="input-group-addon">@</span>
        <input type="text" class="form-control" placeholder="twitterhandle">
      </div>
      <br>
      <div class="input-group">
        <input type="text" class="form-control">
        <span class="input-group-addon">.00</span>
      </div>
      <br>
      <div class="input-group">
        <span class="input-group-addon">$</span>
        <input type="text" class="form-control">
        <span class="input-group-addon">.00</span>
      </div>
    </form>
  </div>
  <ul class="nav nav-tabs">
    <li class="active"><a href="#">Home</a></li>
    <li><a href="#">SVN</a></li>
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    <li><a href="#">VB.Net</a></li>
    <li><a href="#">Java</a></li>
    <li><a href="#">PHP</a></li>
  </ul>
  <script>
    document.getElementById("demo").innerHTML = "你好 Dolly";
  </script>
  <div id="demo1"></div>
  <div id="demo2"></div>
  <div id="demo3"></div>
  <script>
    a = 1;
    b = 2;
    c = a + b;
    document.getElementById("demo1").innerHTML = 100*c + "w";
    x = 1; y = 2; z = x + y;
    document.getElementById("demo2").innerHTML = 200*z + "吗" + "他到底有多少秘密我不知道的";
    document.getElementById("demo3").innerHTML = 200 + z + c;
  </script>
  <script>
    var x1=34.00;
    var x2=34;
    var y=123e5;
    var z=123e-5;
    document.write(x1 + "<br>");
    document.write(x2 + "<br>");
    document.write(y + "<br>");
    document.write(z + "<br>");
  </script>

</body>
</html>